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可在安卓獲取NCERT Math Solution Class 9th (offline)的歷史版本
NCERT數學解決方案的應用程序提供最佳的解決方案。其離線互聯網沒有這個必要。
Chapter 1 - Number Systems
Chapter 2 - Polynomials
Chapter 3 - Coordinate Geometry
Chapter 4 - Linear Equations in Two Variables
Chapter 5 - Introduction to Euclids Geometry
Chapter 6 - Lines and Angles
Chapter 7 - Triangles
Chapter 8 - Quadrilaterals
Chapter 9 - Areas of Parallelograms and Triangles
Chapter 10 - Circles
Chapter 11 - Constructions
Chapter 12 - Heron's Formula
Chapter 13 - Surface Areas and Volumes
Chapter 14 - Statistics
Chapter 15 - Probability